15013997 has 4 divisors (see below), whose sum is σ = 15037440. Its totient is φ = 14990556.

The previous prime is 15013993. The next prime is 15014011. The reversal of 15013997 is 79931051.

15013997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15013997 - 2² = 15013993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15013993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10733 + ... + 12050.

It is an arithmetic number, because the mean of its divisors is an integer number (3759360).

Almost surely, 2^15013997 is an apocalyptic number.

It is an amenable number.

15013997 is a deficient number, since it is larger than the sum of its proper divisors (23443).

15013997 is an equidigital number, since it uses as much as digits as its factorization.

15013997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23442.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 15013997 is about 3874.7899297897. The cubic root of 15013997 is about 246.6978937416.

The spelling of 15013997 in words is "fifteen million, thirteen thousand, nine hundred ninety-seven".